Bending device



V. NAVRATIL May 6, 1930.

BENDING DEVICE Filed July 11. 1928 fiywzzar my 9mm Patented: May 6, 1930 VACLAV NAVRATIL, F IBERWYN, ILLINOIS nnnnrne DEVICE Application filed July 11,

The invention relates to bending devices and more particularly to a device for bending Wood strips either of solid construction or veneered into arched or arcuate form.

It is an object of the invention to provide a bending device which will effectively and conveniently enable a strip of wood to be permanently bent into arched or arcuate form.

A further object aims at providing a plum rality of retaining blocks adapted to secure a metal band in the desired outline and subsequently clamp the wood strip to said metal band so that'the wood strip ultimately retains the outline of the metal band.

Another object aim at providing improved clamping blocks for the wood strip, which are applied singly and-facilitate theclamping of the wood strip to the metal band.

With these and other objects in view, which go will appear from a perusal of the description of the invention, the latter comprises. the means described in the following specification, particularly pointed out'in the claims forming a part thereof and illustrated in the accompanying drawing, in which 9 V Fig. 1 is a top plan view showing a steel band held in functional position by a plurality of retaining blocks and a wood strip secured to the band by clamping blocks. Fig. 2 is a section on the line 22 of Fig. 1, and

Fig. 3 is a section on the line 33 of Fig. 2. Fig. 4 is a view of the reinforcing plate. Referring to theviews of the drawing, 10

designates a table or wall constituting a support or base on which the wood strip is to be bent. A plurality of retaining blocks are 'secured to the table in position to define the particular contour or outline intended for the wood strip. I V I The blocks comprise rectangular members 11 which are secured to the base by a wood screw 12. A steel band 13 encompasses the various retaining blocks and is secured thereto by screws 14 whose heads are countersunk in the band to be flush therewith. V V

. The free ends 15 of the steel band are con nected by chains 16' and 17 the chain '17 terminating in a hook 18 which may be selective- 5Q ly introduced into the'links of the chain 16. A.

1928. Serial No. 291,370.

wood strip 19 is laid incontact withthe band and is held" thereto by clamping members.

The latter comprises rectangular blocks 20 Whose ends are semi-circular and slotted as at 21 and 22. Attention is called to the fact that the slot 22 is deeper thantlie slot 21 fora purpose hereinafter further described. 1

The blocks20 are secured to the'retaining blocks 11 bythrough bolts 23, which areseat ed in the slots 21 and 22 and extendthrough apertures 24; provided in thelblocks 11. Each throughbolt has a nut 25 at thef free end which is held against rotation by a plurality of screws 26 entering the block, 11. V The outer face of the clamping. block 20 is 'reinforced'by a metal plate 27 having :slots 1 in alignment with slots.21jand22 andfsecured V to the block 20 by a plurality of screws' 28, whose heads are countersunk inthe plate-27 'In use, as explainedbefore', the steel hand: 13 is secured in "place by the retaining. blocks 11 Thereafter the wood strip which may be solid or veneered is placed in contact with the band. .To this end the clamping at the center; is first applied by placing the "block 20 so that "the through bolt 23 contacts with the bottom of the slot 22, whereupon the block is swung toward the band and shifted untilthe other bolt 23 is received in the slot 21.

to limit myself to the details of construction as shown but wish to include allchanges and alterations and modifications constituting departures'within the scope of theinvention, as defined in the appended claims,

If desirable, the members 11 may be pro-1 vided with a suitable stifiening bracket X as indicated by dotted lines in Fig. 3. The

bracket X could readily bemade of a flat bar .7

. sired position, said element being fixed to-set of a cross-section as indicated in the drawing and of a Width equal to the Width of the memberll. Suitable Wood screws Would secure such bracket X to the member 11 and also to 1. A bending device including a flexible retaining element, a plurality of spaced retaining blocks for holding said element in deblocks, a plurality of clamping blocks in alignment Withsaid retaining blocks, and

bolts connecting said retaining and clamping I v blocks, said clamping blocks beingplaced in 7 position subsequent to said bolts, a chain secured to each end of said flexible retaining element, and a hook at the free end of one of said chains adapted to be engaged into alink of the other of said chains to thereby facilitate the retainment ofsaid element in arcuate formation. V i i V 2. Abending device including a flexible retainingelement, a plurality of spaced retaining blocks for holding said element in desired position, said element being fixed to set blocks, a plurality of clamping blocks in alignment with said retaining blocks, and bolts connecting said retaining and clamping blocks, said clamping blocks being slotted to afiord their arrangement in functional position with the bolts in place a cha in secured to each end of said flexible retaining element, and a hook at the free end of oneofsaid chains adapted to be engaged into a linkof the other ofsaid chains to thereby facilitate the retainment of said element in arcuate formation; 7 In Witness whereof I afl'ix my signature, VACLAV NAVRZ XTIL. 

